Installation Instructions
DS936 Ceiling Mount Passive Infrared
Intrusion Detection
1.0 General Information
The DS936 is designed to be surface mounted directly on the ceiling or recess mounted
to any 3 1/2 inch (88.9 mm) standard octagonal box.
• Select a location that is most likely to intercept an intruder moving beneath and
across the coverage pattern. Recommended mounting height is 7 ft. to 12 ft. (2.1 m
to 3.7 m).
NOTE:
The DS936 is a Low Profile Ceiling Mount Passive Infrared Intrusion Detector,
which uses alternate polarity pulse count. It uses a pointable Fresnel lens to
provide up to 24 ft (7.2 m) of coverage and may be mounted on the surface,
or semi-flush directly to a ceiling or a standard octagonal electrical box.
Mounting surface should be solid and vibration free (e.g., Drop tiles should
be secured if drop ceiling is used as an air return system for HVAC systems).
• Remove the top cover by gently prying it from the base with the blade of a screw
driver.
• Route wiring through the wire entrance located near the terminal strip.
INPUT POWER: 10 to 15 VDC non polarized; 15 mA @ 12 VDC.
STANDBY POWER: No internal standby battery. Unit is intended to be connected to
DC power sources capable of supplying standby power in the event primary power
fails. 15 mA-H required for each hour of standby time needed.
MOUNTING HEIGHT: 7 to 12 ft. (2.1 to 3.7 m) on ceiling.
COVERAGE: Provides 360° coverage pattern. (Coverage is approximately 2 times
the mounting height, see pattern drawing on page 2.)
SENSITIVITY: Adjustable for Standard, Intermediate, or High.
• Using the enclosure as a template, mark the location for the mounting screws, and
prestart the mounting screws.
• Firmly mount the detector to the mounting
surface.
Recess Mounting With Octagonal Box:
PRY OUT
HOLDER TABS
• To mount the DS936 to a 3 1/2 inch (89 mm) standard octagonal box, remove the circuit board holder
from the base by prying holder tabs out with your
thumbs and pushing the board holder assembly out
with your index fingers.
ON
O 1 2 3
N
OFF
POINTABILITY: ±15° rotationally by moving lens.
ALARM RELAY: Normally Closed operation and protected by a 4.7 ohm resistor in
series with the relay contact. Reed relay with contacts rated at 28 VDC, 125 mA maximum for DC resistive loads.
TAMPER:
The base may be discarded or saved for possible
future use.
OCTAGONAL BOX
• Route wiring as necessary through the box and into
the wire entrance.
Normally Closed tamper switch rated at 28 VDC, 125 mA.
DS936
• Mount the circuit board holder assembly to the box.
LED OPERATION: Dip Switch On/Off Selectable.
TEMPERATURE: The storage and operating temperature range is -20°F to +120°F
(-29°C to +49°C). For UL Listed Requirements, the temperature range is +32° to +120°F
(0° to +49°C).
BOARD HOLDER ASSEMBLY
Recess Mounting Without Electrical Box:
The DS936 may be recess mounted without the use of an octagonal
box by using the supplied flush mount ring.
• Remove the board holder assembly from the base by prying
holder tabs out with your thumbs and push the board holder
assembly out with your index fingers.
OPTIONS: TC6000 Test Cord.
• Using the inside cutout of the flush ring as a template, prepare
an opening 2-3/4" by 2-5/8" (70 x 67 mm) wide in the mounting surface.
PWR
1
2
RLY
3
5
T
6
TAMPER
SWITCH
DETECTOR
ELEMENT
+
-
4
T
TEST/
ALARM LED
BACKGROUND NOISE
VOLTAGE OUTPUT
ON
OFF
O 1 2
N
3
CONFIGURATION
SWITCHES
• Route wiring through opening and flush mount ring.
• Place the flush mount ring over the opening and bend the support tabs into the
opening and around the mounting surface so that the ring fits snug against the
surface.
• Route wiring through the wire entrance.
• Mount the detector to the ring using the supplied screws.
3.0 Wiring
W ire En tra nce
• Connect wiring as shown:
NOISE VOLTAGE
WIRE SLOT
View with Cover Off
2.0 Mounting
THINGS TO AVOID/REMEMBER
AVOID
• Direct hot and/or cold drafts • Windows • Small Animals
• Air Conditioning Outlets • Heat Sources • Direct Sunlight
REMEMBER
• Won’t detect through glass
• Best catch performance is across the pattern
• When using two or more detectors, cross the patterns for best coverage
CAUTION:
APPLY POWER AFTER
ALL CONNECTIONS
HAVE BEEN MADE AND
INSPECTED.
P WR
1
2
1 0 to 15 VDC
NON Po lar ized
RLY
3
4
Alar m
Re lay
T
T
5
6
Tam pe r
• Terminal 1 & 2 power limits are 10 to 15 VDC measured at the terminals. Use no smaller
than #22 AWG (0.8 mm) wire pair between the unit and the power source.
• Connect a Normally Closed burglar alarm loop to terminals 3 & 4.
• Connect a Normally Closed Tamper circuit to terminals 5 and 6. Tamper contacts
rated at 28 VDC, 0.125 amps.
NOTE: Do not coil excess wiring inside unit.
4.0 Configuration Switch Settings
6.0 Final Test
NOTE:
Sensitivity
Switches 1 & 2
High
= 1 ON 2 OFF
Int.
= 1 OFF 2 OFF
Std.
= 1 OFF 2 ON
Meter readings are very important in determining
background disturbance levels and catch margin
sensitivity.
WHITE
RED
BLACK
TC6000
• Connect a 20,000 ohm/volt (or greater) DC VOM to the
Background Noise Voltage connector pins as shown.
Set meter scale for about 5 VDC. Route meter wiring
through the slot in the base. (Use of the TC6000 is
recommended, but is not essential for meter use.)
• Replace the cover assembly.
ON O 1 2 3
N
OFF
• The base reference level for reading background noise or target voltages is
approximately 2 VDC. Installations in quiet environments, therefore, will result in a
steady meter reading between 1.8 and 2.2 VDC.
LED
Switch 3
LED Enabled = 3 ON
LED Disabled = 3 OFF
Sensitivity:
Voltage changes greater than 0.75 VDC from the reference level are desirable for
good catch performance. If changes are less than plus or minus 0.75 VDC, the
device may fail to respond at this distance if the temperature difference between the
intruder and the background is very small.
• Turn on all heating and cooling sources that would normally be in operation during
times of protection. Stand away from the unit and outside the coverage pattern, then
monitor the background noise voltage for at least three minutes.
The DS936 permits selection of response sensitivity modes depending on the type of
coverage desired and the installation environment.
• Standard (STD): Least sensitive setting to environmental extremes, but requires the
largest amount of intruder motion to achieve an alarm.
• Intermediate (INT): Recommended setting for most installations. Use in locations
where an intruder is only expected to cover a small portion of the protected area.
Tolerates normal environments on this setting.
• High: Fast response to intruder signals. For use only in quiet environments where
thermal and illumination transients are not anticipated. If both switches 1 and 2 are
ON, the detector defaults to High Sensitivity.
NOTE:
Although the sensitivity modes provide different degrees of tolerance to
environmentally caused alarms, the installer should assure peak
background noise voltage readings do not exceed ±0.2 VDC.
DS936 readings should not deviate from the reference level more than ±0.2 VDC.
For readings outside these limits, eliminate the cause, re-point the unit slightly, or
mask off the effected zones.
7.0 Other Information
Maintenance:
At least once a year the range and coverage should be checked in accordance with
Section 5.0 - Setup and Walk Testing.
To ensure continued daily operation, the end user should be instructed to walk through
the outer edge of the coverage pattern. This ensures an alarm output prior to arming the
system.
Standard Pattern
Top View
8.0 Coverage
LED Operation:
If viewing of the walk test/alarm LED is not desired after the initial installation, the LED
may be disabled by placing configuration switch 3 in the OFF position.
4.5
3
1.5
Meters
0
1.5
3
4.5
15
4.5
10
3
5
1.5
0
0
5
1.5
10
3
5.0 Set Up And Walk Testing
• Apply power to the unit.
• Wait at least two minutes, after applying power, to start walk
tests.
NOTE: Walk testing should be done across the coverage
pattern.
• The edge of the coverage is determined by activation of the
alarm LED. This will change depending upon the sensitivity
switch settings.
• Walk test the unit from all directions to determine
the boundaries.
4.5
15
15
• The pattern may be adjusted ±15° by rotating the
lens. Insert the blade of a small screwdriver into the
slot on the lens and gently slide the lens in the
desired direction.
10
5
0
Feet
5
10
15
Side View
4.5
3
1.5
Meters
0
1.5
3
4.5
0
8
2.4
10
3.0
3.6
12
15
© 2004 Bosch Security Systems
130 Perinton Parkway, Fairport, New York, USA 14450-9199
Customer Service: (800) 289-0096; Technical Support: (888) 886-6189
10
5
0
Feet
5
10
15
02/04
DS936 Installation Instructions
P/N: 23192H Page 2